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A white substance was known to be either magnesium hydroxide, calcium hydroxide, or zinc oxide. A 1.78 g sample of the substance was mixed with 50.0 mL of water and 100.0 mL of 0.731 M HCl was added. The mixture was stirred, causing all of the sample to dissolve. The excess HCl in the solution required 94.9 mL of 0.128 M NaOH for complete neutralization in a titration. What was the molecular formula of the white substance?
when a blue copper(II)nitrate solution is mixed with a colorless solution of sodium sulfide
Ascorbic acid has a molar mass of 176.14 g/mol . What is the molecular formula of ascorbic acid
What Celsius temperature, T2, is required to change the volume of the gas sample in Part A (T1 = 41celsius, V1= 1770 L) to a volume of 3540 L ? Assume no change in pressure or the amount of gas in the balloon.
Which of the following is an experimental fact that valence bond theory cannot explain, but molecular orbital theory can? A) the paramagnetism observed for O2
Consider the reaction H2(g) + I2(g) -> 2HI(g) delta G degrees at 298K = 2.60 kJ/mol. In an experiment the initial pressures are H2=4.26 atm, I2 = 0.024atm, and the HI =0.23atm Calculate A. Dellta G and B. predict the direction of the net reaction
The average concentration of strontium ion in seawater is 8.00 mg of strontium ion per kg of seawater. What is the molarity of the strontium ion if the density of the seawater is 1.025 g/mL.
if 8.6L of H2 reacted with 4.3L of O2 at STP, what is the volume of the gaseous water collected (assuming that none of it condenses)?2H2(g)+ O2(g)--> 2H2O(g
Calculate the heat required to convert 24.0 g of C2Cl3F3 from a liquid at 12.00°C to a gas at 56.00°C
The half-cell is a chamber in the voltaic cell where one half-cell is the site of an oxidation reaction and the other half-cell is the site of a reduction reaction.
How do you redraw methane to show the tetrahedral character of carbon in methane by drawing methane using solid wedges and dashed wedges?
Write the balanced chemical equation for the combustion of mesitylene. Remember to start with the molecular formula (not the empirical formula).
What is the molarity of a 15.5 m (m stands for molality) solution of HCl if the density of the solution is 1.33 g/cm^3.
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